Automatic governing device for gasolene-engines.



PATBNTBD FEB. 6, 1906.

D. C. MQfmRBLL.V AUTOMATIC @mamma BEYISE PUR GASOLBNE mismas.

APPLICATION PILEB FOV.29,1904.

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DAVID C. MGGARROLL, GF KANSAS CITY, MISSOURI.

AUTOMATlC GOVERNING DEVICE FOR GASOLENE-ENGlNES.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed November 29| 1904. Serial No. 234,702.

My invention has for its objectI the regulation of the speed of the engine by varying the volume or supply of air and gas to the cylinder or cylinders in pro ortion to the degree of resistance occasioned y the load carried by the engine in the transmission of power from the drivingeshaft of the engine.

The invention consists in the novel construction and combination of parts, such as will be first fully described and then specifically pointed out in the claims.

ln the drawings, Figure l is a plan view oi a compound gasolene-engine shown u on its bed and with the invention applied t creto. Fig. 2 is a vertical sectional view taken upon the line :n of Fig. l. Fig. 3 is an enlarged detail broken View in perspective of the rotary shaft carrying the governor, showin in detail the sleeve and lower ortions of t e links connecting the sleeve with the arms of the governor, the upper and lower slotted caniplates and the sprin -controlled expanding and contracting cam between the said lates and the automaticall Y-operating cam-c osing device connected wit the sleeve. datail view in plan of the lower slotted carnplate, showing the expanding and contracting cam on the shaft and the arm and spring. Fig. 5 is a lon 'tudinal sectional view of tne rear end of the ed-rame, showing the bracket and journal-bearing for the governor-shaft.

Fig. 6 is a plan view in detail of the cam operatin the exhaust-valve.

Similar numerals of reference indicate cor- .responding parts in all the gures of the drawin s.

teferring to the drawings, 10 indicates the cast frame or bed, upon which are mounted the 'acketed cylinders 12 12 of a compound gaso ene or gas engine, the rear ends of the cylinders projecting a considerable distance beyond the line of the rear end of frame 10.

14 indicates the inlet-valve casings for the Fig. l is a mixed air and gas on the top and rear end portions of the c Tlinders.

15 indicates t e exhaust-valve casings on the under side of the cylinders, and 16 indicates the exhaust-pipes leading from the casinv.

D17 indicates the niain sup ly-pipe for the mixed air and gas, which is s iown connected with a three-way pipe-joint 18, and 19 V19 are branch pipes, the inner ends of which are connected with the three-way pipe-joint 18 and the outer ends extended in opposite directions and connected with the top of the inlet-valve casings 14.

2O indicates the drivingsliaft of the cngine, which is journaled in the journal-boxes ,21 on the forward end of the bed-frame.

22 re resents the crank-wheels on the ends of the riving-shaft 10.

28 represents the piston-rods, the outer ends of which rods are' connected with the wrist-pins 24 on the crank-wheels.

25 indicates the ily or balance wheel on the driving-shaft 20.

i Adjacent to the rear end of the bed-frame llhlsupporting the cylinder 12 of the engine, is a rotary governor-shaft 26, which is arranged in a vertical position and at a oint midway between the cylinders 12 12 an in a line transversely with the axis of the inletvalve casin s 14 and the exhaust-valve casings 15. T e lower end of the rotary shaft 26 is stepped in an outwardly-projecting boxing or lug 28, secured to the rear end of the bed-frame 10, ashort distance upwardly from the lower edge of the said frame, in which boxing is a vertical openingror bearing 29.

Upon the rear end of the ame 10 is a vertical bracket 30, which extends from the upper surface of the lng 28 a short distance above'the line of the upper edge ofthe frame 10, and upon the outer surface and upper end of said bracket is a lournal-box 31, which is in a vertical line wit the ivot-bearin 29 in the lu 28 and in which Journal-box 1s su porte the vertical governor-shaft 26. Tige upper end of the governor-shaft is reduced in size circumferentially, and upon said end is fitted a sleeve 32, from the sides of which extend radially the flanges 33. Vith the said flanges are pivotally connected the forked ends of the governor-arms 34. Upon the lower end and outer edge portions of the arms 34 are the weighted balls 35. Upon the shaft 26, below the positions of the balls 35, is a slidable sleeve 36, upon the outer surface IOO IIO

lof which are the forked lugs 37 37. With the lugs 37 are pivotallyT connected the lower ends of the links 38, the upper ends of which links are pivotally connected with the outer ends of the arms 38.

Within the inlet-valve casings 14 are longitudinal artitions 39, which are located adjacent to 51e inner side of the casing and extend to within a short distance of the top of said casing and are bent at right an les and extended to the inner surface of t e outer side of the casing, thus forming a narrow chamber communlcating with the inner ends of the air and gas supply pipes 19 and upon one side of the partition and a large chamber 40 on the other side of the artition. Leading from the bottom of the chamber 40 in the valvecasings 14 through the side of the cylinders 12 are the openings 41.

In the vertical portion of the partitions 39 are the valve-openin s 42, and upon the sidev of the partition in t e chamber 40 are the valve-seats 43. With the valves 44 in the .seat 43 are connected the inner ends of the valve-stems 45, the outer ends of which stems extend through the inner sides of the valvecasings and through the stuffing-boxes 46 the proper distance in the direction of each other to be operated upon, as hereinafter described.

Upon the valve-stems 45, a short distance from the stuffing-box 46, is a fixed annular plate or washer 47. Extending around the stem is a spiral spring 48, one end of which bears on' the washer and the other against the stuHing-box 46. The extreme outer ends of the stems 45 are forked, and in the said Yforked ends are journaled the anti'friction-rollers 49.

In the exhaust-valve casin s 15 on the under side of the cylinder 12'(wh1ch are the sar'ne as the valVe-casings 14 inverted in position) are the longitudinal partitions 50, which are the same as the partitions 39 in the valvecasing 14. In the vertical portion ofthe par'- titions 50 is seated the exhaust-valves 51, connected with which are the valve-stems 5,2, which extend through the inner side of the valve-casing and the stufHn -bpxes 53. Upon these valve-stems 52, w 'ch are the same in length as the valve-stems 45, are the fixed washers 54 and the sprinfl55, vbearing against the washer and stu gbox 53. Upon the outer ends of the valve-stems 52 are the antifriction-rollers 56. The outer ends of the valve-stems are supported by brackets 57, secured to the rear end of the bed-frame 10. Upon the upper end of the brackets are journal -boxes 58 58 in line with the valve-stems and which receive the end portions of said stems between the fixed washer 47 and the antifriction-rollers 49. Upon the lower ends of the brackets are the journal-boxes 59 59, which are in line with the valve-stems 52 and su port said stems between the washers 54 an the rollers 56.

Upon the shaft 26 for the governor in a horizontal line with the valve-stems 45 is arranged the valve-operating compound cam, which is composed of the upper and lower annular cam-plates 60 and 61, which rotate with theshaft 26, and upon a portion of the outer edge of said plates are coequal projecting concentric portions which form the cam 62, the edge portion of which cam-surfaces are less than one-fourth of the circumference of the plates and which act upon the rollers 49 49 on the respective valve-stems alternately when they come into contact in the rotation of the governor-shaft 26. The lower cam-plate 60 is secured to the shaft 26 by a boss 63, cast on the under side of the plate, extending around the shaft and secured by the screw-bolt 64. Upon the upper surface of the cam plate or blade 60 is an automatic supplemental cam-expanding late 65, which extends radiall from the sha t 26, the outer edge ortion o which plate is curved in the arc o a circle and is in a vertical plane with the ou'ter edge of the cam 62, the length of the said curved edge being slightly less than the cam 62. Upon the inner end of the plate 65 isa ring or collar 66, extendin *loosely around the shaft 26. Connected rigi ly with the collar 66 and extending in the opposite direction to that of the cam-expanding plate 64 is an ar'm 67. Between the plate 60A and the plate 6'1 is a separating-plate 68, slightly of increased thickness to that of the plate 65, which extends from a position in line with the end of the cam-surfaces 62 a portion of the distance circumferentially to the plate, the inner edge 69 extending 1n a line tangential to the shaft 26 and the end of the plate opposite the arm 67 being cut away upon a hne radial to the shaft, and upon said end is a lug 70. With the lug 70 is connected one end of a spiral spring 71X, the other end of which s ringl .is connected with the outer end of t Ie arm 67 on the collar 66. The longitudinal edge portion of the cam-expanding or extension plate or blade 65 op osite the inner edge 69 of the se arating-pate 68 extends from the outer e ge of t e collar 65 to the outer end of the plate in a line tangential to the shaft 26, and when in position between the upper and lower cam-plates 6U and 61 said inclined edge contacts with the edge portion 69 of the separating-plate 68. n the opposite edge of the plate 65 is an opening extending from the outer edge of the collar 66 at a tangent to the shaft 26 and for a short portion of the length of the plate in the direction of the central ortion and from said point to the outer en of the plate at an acute angle, as at 70, and transversely to the line of the edges of the slots 72 68 is a small separating-plate on the up er surface of the plate 60, on the other side o shaft 20. Adjacent to the edge portion 70 of the cam-expanding plate 65 and in the respectiveupper and lower plates 60 and 61 are cam-slots 71 72, regis- IOO tering with each other and the ripening in the i cani-binde (55, said slots being upon n line tengentiei to the shaft 26 and n. eher-t distance inwardly frein the Cirnuinferenee ni the pinten 60 and l T lirougn the sint 72 in the plete 60 and the niet 71 in piete 6() is extended the upper end 0i a Eiatepernting angie-liar 73, which is movable in a vertical direction in said slots, the rear edge H being in n parnliel iine with shaft 2n end tile inrwerd edge 75 intending from e peint ashert distei'lee beim-vY the up er end of tne liar in n. downwardly and orw'zndiy extended inclined piene, the edge pnrtinn (neming int() enntnet with the edge portion T() n( the cern-expanding @inte 6.3 and ninving said plate in the direetnn ni' the edge pnrtinn 69 of the sepnntii plate (58J The rear edge and upper end pernnn nf the angle-ber 723 ie sevnred rigidy tn the outer end ni' e tixed lucr 76 en tie outer Surface ni the sleeve nn the gnverni` -ehni't 26, Wlilel'l lug in incnled directly belen' the lugs 37, with l which the les 3() ere vnnneetrd. On t gnverin j t E5, in :i linrizyninl r (lic exi i-Ynlve Sterne 52, is n vani-pit. '77, ne seen in dei Y .n Fig which @were alternately the eXheust-vnlves.

Upon the driving-shaft 2() (nl the engine Y a worin-geur 79.

8() indicates the tiensxnieei;

elini'telinnger S1 nn the side of t'e be (D, Upnn the Suid ed of sleit 8() is n 82, which engages with te Urin-Wi 'Y The ether end of Sift 8() extends tn the reel1 end nf the bed-'freine l() in near the gnvernnrnhnft 2G, :1nd ngiin L Y 0nd is n bevel-gear Upnn the gnverner shaft is a bevel-gen1' 84, with which the gear 83 engages.

S5 indicates the epnrk-igniting devine in the end of the cylinders 12, which is Gf the ordinary description.

in operation the mixed nir' and gine in the proper pnrportions is conducted through the pi es l? and i9 tn the chambers 4() nl in the in et in exhaust-valve casinge i4 (di. 'During the initiui Snpply nf gas to the engine ier prnduoing the energy necessary tu eccnrnplish under re ieated explosions the cycle nieve ine-nts, w ich require two 01 more cninpiete revnlutinns of the balance or (iy wheel, in the stages n? compression, explosien, and nonsequent expansien and exlienet, the punition 0i the arms 34 nn the governor are Cluse to and nearlyv pnrnllei with tlm shaft and ri'itated in the drectinn nl tiie arrows in Fig. '2. Cnnse- 2 c uentiy the angle-ber S is at tlie limit nf its l (lnwnward movement in the siete T1 and 72 in the reepeftive cani-plates (5() and 61, end @nin-pinten 65, under the pm Y ,n nf the spring` 7l, retains seid plete nnwnrdljf in its nnrinnl pl'ieitinn'nnd 1 with the inwardly-inclined edge portieri of l nient the drivingi i Completed ene *nll i ,tati-un, and 1n the niennl tn ti'nnlin'lt nid Said piatte in enntert Witn the forwardly and downvynrdiy inclined surface 75 n? the anglebnr 74. During the initial innvenients of the shaft 2G, Stated) 'iie :inni-surface 62 0f the platee (5() and end also the cani-surface of the supg'ileinental cam 65 mines in contant with the antiiirietinnrnllere 49 4Q on the valve-Meine- Y iigfernting the inietwnlvee 4%; and the inil veiinne ni' mixed air and 7ie admitted tn tiie cylinders 12 l2 of the engine niternnieiy and ignited by the igniter dining the tinie'required im* the rntni inn et the nein* plates (i0 and (ii pesi the \f'nlveete1ne ene'- fnurth ni their Cin'nnferenre, in wnicil Inovenft 2() nl' the engine line time n nain '2? einen into nordnet with the velve= ine mi' tlu exhaust-Vabres .3l

.31, which are opened tn perlni( the exit of the nir eens from (he s 'i' dere V2. Folinwinl tl e expl sinne n( :and under pulse-e vnnveyed tn i wheel the Speed tne fue is nefeereted i the increased ineinn ni' the dri\'in;-elinl't 2() unin- Innnieeim' tn (lie newer-mnnniieeinn elmft mit 26 dirins Y Re 3R, the s itin* eine V"'l (51"), end mine; L bei* tn 'nree tine Cent-er; piate in ts direction nf the eepinnt eg-plete (3S and between the vz'irrl-snrfneee nf die platee (il) and 51, tnns pre-sentii ier tnet with the reller 49 0n the valu, LYtenis n. decreased length 0r contraction et' the circumferential areny ni' Cain-Surface ef the rain, wliieli action allows the iniet-vnlvee 44 (n einen sonner` thus admitting nA leener vninine of the inixednir end gas tn the cylinders of the engine, Wlueh lessens the degree ni Compression, thereinT gew erning the speed ni tne engine eeci'frding te. the load it ie eerring.

it i5 deviene dint the repented sentent nt the rnliers 49 en the spring-ernnted velvesteine te tin" inlet-Rudern upon (ne Pnnnsur- 'ienne et nein ne ienne and (ric-d cnunplntee Wiii tiene a tsnedency to retein tint supplementary ennnpinte in @ornent wi'ii tile edge i nnfYle-nzn' and in en nnen pnsiinn n spring is enniinjfe in not, end 'nlnyed nesiss tn @dei 2in ,Quinn TC- L also ngwinne that the ne nppied te eiier er nulli i l der er einen, the punition m 'r Yerrin1-slini`t f nienee er the.

I now claim as new, and desire to secure by Letters Patent, is*

1. In valve-4pcrating mechanism a rotary shaft, a main cam-plate Iixed on said shaft, and a supplemental cam-plate loosely connected with said shaft and having its cam in a normally open or extended position from the fixed cam said plates having registering openings extending tangentially to the said shaft, an angle-bar having an inclined edge within said registering openings adapted to move said loose cam-plate toward a coincident position with the cam on the lixed camplate and self-adjusting means lor holding the supplemental cam-plate .in contact with the said inclined edge of said angle-bar.

L. In valve-operating mechanisn'i a rotary shaft, a main cam-plate lixed on said shalt and having a slot extending tangentially to the circumference of said shaft, an anglebar having an inclined edge within said slot and a cam-blade loosely connected with said shaft and normally in an open position from the cam on the main cam-plate and having a notch in the direction of said angle-bar and a radial arm on said blade and resilient means for retaining the notched portion of the calnblade in contact with the inclined edge ot said angle-bar.

3. The combination in an engine with the governor-shalt and governor and with a valve-operating spri iig-controlled valve-stem on the engine ol` a compound cam on the governor-shaft consisting ot a main cani-plate and cam lixed on said shaft and a supplemental member of said compound cam loosely connected with said shaft, said main and supplemental cani-plates having suitable registering openings extending tangentially to the circumference of said shaft said loose member of the compound cam having its cam-surface in a normally Open or extended position from the cam on the fixed cam-plate and in the opposite direction to the rotation ol" said shaft both cam-surfaces of the coinpound cam being adapted to come into contact with the spring-actuated valve-stein and control the time of the opening and closing of said valve by the reciprocal movement of the loose member, and a movable angle-bar actuated by the governor having an inclined edge within said registering openings in said lixed and loose members ol said compound i cam with which inclined edge the side of the opening in the loose member contacts said angle-bar acting to vary the movements of the loose member ol the com pound cam from the reciprocal action of the valve-stem.

4. The combination in a gas-engine with the cylinder and piston and piston-rod, of a driving-shaft actuated thereby, gas supply and exhaust casings on said cylinders and valves within said casings, spring-retracted valve-stems connected with said valves, a governor-shaft and governor, a movable sleeve on said shaft, operated by the governor, means fortransmitting power to the governor-shaft from the driving-shaft, a main cam-plate on the gi )vernor-shatt, having a slot therein, a supplemental cam plate or blade, a collar connected therewith extending around the shaft ot the governor, an arm on said collar, a spring connected with the main eamplate and said arm, and an angle-bar in the slot of the main cam-plate connected with the movable sleeve on the shaft of the governor and bearing against the suliplemental camblade.

DAYID (l. MUCARROLL.

Vitnesses:

JULIUs A. HANSEN, ANNin L. GREEK. 

